/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2021-2021. All rights reserved.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.huaweicloud.sdk.core.impl;

import okhttp3.Headers;

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/**
 * @author HuaweiCloud_SDK
 */
public final class DefaultHttpUtils {
    /**
     * The utility class should hide the public constructor
     */
    private DefaultHttpUtils() {

    }

    /**
     * Convert headers to map.
     *
     * @param headers Headers
     * @return Map
     */
    public static Map<String, List<String>> headersToMap(Headers headers) {
        if (Objects.isNull(headers)) {
            return null;
        }
        Map<String, List<String>> result = new LinkedHashMap<>();
        headers.names().forEach(name -> result.put(name, headers.values(name)));
        return result;
    }
}
